Stapling-machine for leather loops



F. H. WILBUR. STAPLING MACHINE FOR LEATHER LOOPS.

APPLICATION FiLED SEPT. l5, 1919.

Patented' Deu. 20, 1921.

2 SHEETS- SHEET I.

F'. H. WILBUH. 4STAPLING MACHINE FOR LEATHER LOUPS. APPLICATION FxLx-:sEPT.15. 1919.

1,400,843. Patwted Dev.20 ,11921.

' v 2 SHEETS-SHEET 2. Q-Pf Z QH-X,

/ l s Y '2 J la 3a` .zr 35 /iz E? Z i #ML jwffwo l? BY MM,

nnnnnnicn n. Winnen, or nrnenanron, new Yoan, essie-non ronnrnorns romano, onto, a eonronnrrolv or J u O application filed ont t may concern:

hner/n that l, llnnnnnicn ll. WIL- nnn, of Binghamton, in the county of Broome, in the State oit New York, have invented new and useful improvements in tapling-lilachines i'or Leather Loops, of which the olloiving, taken in connection with the accompanying drawings, is a full, clear, and eact description.

'llhis invention relates to certain iniprovenients in loop forming and attaching machines to he used in connection With harn nos; inaliing and other arts Where loops of leather or other flexible material are to he 'plied to stings oli thesaine or ditleient rial. ,Che stock tor these loops is usually cut to the desired length from a strip o1" leather oit' predetermined Width to `forni substantially flat blanks which are then folded around a suitable :torni with their ends lying subctantialy in the saine plane and in close jui; .position where they are fastened to a strap or other body 'oy metal clenchers iniadiatcly following the folding operation, so that the Afolding and clenching are pertornied in practically one and the saine operation.

lt is weil known that these loops vary inaterially in Width and length vand the main object oit my present invention is to provide ineens whereby the saine machine niiay he used ttor applying loops of diii'erent lengths.

Another object is to provide means tor supporting a oleneher Within the loop during the leiding operation and ior automatifa lijf releasing said clencher and loop irninefollowing the folding and clenching ,L rations.

Another object is to provide means for removing the strap, with the loop attached thereto, from the torni.

lther objects and uses relating to specific tollmving description. in the drawings:-

ltigure l is a side elevation partly in section and partly broken away of portions of a loop toi-ming and attaching machine emhodying the various features of my invention.

Fig. 2 is a :front elevation of the saine, omitting the pedal lever.

specification oi' Letters Patent.

September 15,

t parts :ft the machine will be brought out in Zeatented Dee. 2d, liet..

wie. serial no. senese.

liigs. 3 and e are enlarged side elevations, partly in section, ont the Work supporting bed and loop forming and applyingJ inecha nisno in its open and closed `positions respectively.

F ig. 5 is a horizontal sectional view taken on line 5-5, Fig. 2.

lTig. 6 is a perspective view of one of the clencher staples.

Fig. is an enlarged front elevation of theA essential portion of the machine.

liig. S is an enlarged sectional vieiv of the blanlr holder and former around which the blanlr is to be folded, together with the means ior folding and releasing the blank upon and troni the forming die.

Fig. 9 is a perspective view of a portion of leather strap and loop attached thereto by the forming and attaching machine.

is illustrated this machine coinprisesa niain supporting traine lconsisting of a horizontal hed 2-- and an upright bracket -3-, said traine beingalso provided with a supporting nieinber -lfor a pedal lever 5eA by which the inovahle parts of the loop orining and clenehing mechanism ma be operated in a inanner hereinafter described.

The hed 2n is provided with a boss -l'- projecting short distance above its upper face and preferably termed integral therewith, said hoss being provided with a dove-tailedgroove T-` for receiving and supporting a lower die or anvil -8, the latter being provided With a dove-tailed rib -9-, `lidably litted in the groove -7- Wnich permits the anvil to be reinoved and replaced by others of different sizes according to the dimensions of the Work to which a loop is to he applied.

The lower tace of the die or anvil -8-- is provided 'with a slight depression -l0-- for receiving a ball catch mll which is forced into the recess -10- by a light coil spring -l9- when the die 8 is adjusted to its proper position in registration with the superposed plunger presently described, the upper tace of said die being provided with grooves -13- for deflect-ing the points of a staple as -l4`by Which the ends oi the loop as -c are fastened to the strap or body A-, as shown in Figs. e and 9.

The upper end of the bracket -3- over hangs the die or anvil -8 and is provided with vertical guide-ways and -16- arranged one in front of the other in close proximity for receiving a vertically movable connecting rod -17 and a simig larly movable plunger 18-, and guiding them in parallelism during their vertical movement.

The plunger n153-- is alined vertically with the die or anvil -8- and cooperates therewith in a manner hereinafter described for moving the loop-blank and loop together with the staple into engagementJ with the work or strap -A on the anvil -8- against the action of a pair of retracting springs -19, the lower ends of which rest upon stationary lugs 20 on opposite sides of the arm or bracket -3-, while their upper-ends are engaged with the plate 2l-aon the upper end of the plunger as shown more clearly in Figs. 2 and 7, said plate being held in its operative position by a removable key 227 so that by re moving the key, the plate 2L- and springs -19- may be also removed or replaced at will.

A stop shoulder Q8- is secured to the rear' face of the plunger -l8-- for engage mentvwith the under side of the adjacent portion of the arm or bracket l3 for limiting the upward movement of said plunger by the springs -l9-. The lower end of the plunger -l8 is provided with a dove-tailed groove -24-f for receiving a similarlyshaped rib -25- on the upper end of a removable section -26- of said plungerso that the section 2G- may be removed and replaced by other sections of different sizes according to the dimensions of the loop which it is adapted to support or retain in place during the application of the loop to the strap or body -A-.

The lower end of the section --26- is made of hardened steel and is provided with ribs -27- for impressing 'corresponding iinishing grooves in the upper surface of the loop while the latter is being applied to the Strap -A'-, the said hard portion being preferably made vseparate lfrom the main body and the section 26- and is secured thereto by one or more screws-28-7 shown by dotted lines in Fig. 8.

The section -26- is also provided with an opening -29 therethrough from front to rear and extending from the hardened portion as --2- to within a relatively short distance from the top of the upper end of the section -26-, so as to form a guide for a vertically movable'holder-30, having front and rear pendant arms-3l` and 32-, adapted to travelV across the corresponding faces of the hardened section -26 as it is moved vertically in a manner hereinafter described,

An angular blank support 33 having an upright portion 34- and a horizontal portion -35 is mounted upon the plunger section -26 for supporting theloop-blank and loop while it is being attached to the body -A., the horizontal portion -35- oonstituting the die or form around which the blank is folded into the form of a loop f by mechanism presently described, the rear upright portion being attached to the corresponding' face of the section 2- by screws H36- which pass through vertically elongated slots 3T- in the upright portion of the part 33-- to permit slight vertical adjustment of the die -35- for different thicknesses of leather or other material from which the loop is to be formed, it being understood that the form is normally spaced apart from and below the lower face of the die *26'* of the plunger section -26-, as shown more clearly in F ig. 8.

The holder 30 is normally held in its uppermost position by means of a. catch thereon and a spring detent S9- which is secured to a cross-head -fi0 on the lower end of 'the connecting rod l7-, the upper end of said rod being connected by a link -4l to the front end of the rocl': arm or lever -r2 which is fulcrumed at -t3 upon the arm 3- of the main supporting frame and has its rear end connected by a link *dllto the lower end of the pedal lever 5- as shown in Fig. l.

rlhe cross-head -40- has a limited vertical sliding movementon the plunger l8- for a purpose hereinafter described and is provided with opposite laterally projecting arms -lhaving lengthwise slots-46- for receiving' and guiding a pair of sliding laterally adjustable pivotal bolts -l7 which are located equal distances at opposite sides of the plunger -18- and are provided with internally threaded heads or nuts -ilS- for engagement with opposite threads of a rotary spindle -49, the latter leing journaled in suitable bearings -50 on the outer ends of the arms -lw and is provided with a hand-wheel 5lby which it may be rotated for adjusting the pivotal bolts #17- simultaneously in opposite directions toward and away from the plunger -l8-.

A pair of levers -52- are centrally pivoted to the bolts so as to stand in a vertical position at opposite sides of the plunger -l8 and have their upper ends cooperating with suitable cams -53- for rocking said levers about their pivots and thereby causingtheir lower ends to fold the ends of the blank around and under the form -35 as the plunger is forced downwardlyby the depression of the front end of the pedal lever -5- in the operation the cross-head through the medium of the spring detent 39 and catch -38- will be moved still farther by the weight of the longer rear end of the lever 4QF and pedal lever connected thereto, until limited by the engagement of the upper ends of the levers 52 with the stops -56-.

What I claim is: Y

l. In a loop-forming and attaching machine, the combination of a support for the article to which the loop is to be attached, a plunger movable toward and from the support, means 'for operating the plunger, said plunger having a removable section slidably interlocked with the main body thereof, a form on said section for supporting a loop-blank and around which said blank is adapted'to be folded, and means actuated by the plunger operating means for folding the ends of the blank around said form.

2. In a loop-forming and attaching machine, the combination of a support for the article to which the loo a is to be attached, plunger movable toward and from the support, means for operating the plunger, said plunger having a removable section slidably interlocked with the main body thereof, a form on said section for supporting a loop-blank and around which said blank is adapted to be folded, means actuated by the plunger operating means for folding the ends of the blank around said form, and means on the plunger for receiving and temporarily holding a clenching staple in position to be clenched through the ends of the folded blank and work to which the loop is to be attached as the plunger is forced toward said support.

3. In a stapling machine for leather loops, the combination of a supporting ar fil for one of the parts to be attached, a bracket overhanging the anvil, a plunger movable on the bracket toward and from the anvil, holders for the loop-blank and staples, respectively, both slidably mounted upon the plunger and movable therewith toward and from the anvil, a cross-head slidably mounted on the plunger, a pair of levers centrally pivoted to the cross-head for folding the ends of the loop-blank around its holder between the staple and anvil, whereby. the movement of the plunger toward the anvil will clench the staple throughV the part to be attached, cams on the bracket engaging the levers above the cross-head as said crosshead is moved toward the anvil for causing said levers to fold the ends of the loop-blank around the blank-holder and staple, and means for sequentially operating the crosshead and plunger.

4;. In a stapling machine for leather loops, the combination of a supporting anvil for one of the parts to be attached, a bracket overhanging the anvil, a plunger movable on the bracket toward and from the anvil, holders for the loop-blank and staples, respectively, both slidably mounted upon the plunger and movable therewith toward and from the anvil, a cross-head slidably mount@ ed on the plunger, a pair of levers centrally pivoted to the cross-head for folding the ends of the loop-blank around its holderbetween the staple and anvil whereby the movement of the plunger toward the anvil will clench the staple through the part to be attached, cams on the bracket engaging the levers above the cross-head as said crosshead is moved toward the anvil for causing said levers to fold the ends of the loop-blank around the blank-holder and staple, means for sequentially operating the cross-head and plunger, and a spring for yieldingly holding the upper ends of the levers in en -gagement with said cams.

5. In a stapling machine for leather loops, the combination of a supporting anvil for one of the parts to be attached, a bracket overhanging the anvil, a plunger movable on the bracket toward and from the anvil, holders for the loop-blank and staples, respectively, both slidably mounted upon the plunger and movable therewith toward and from the anvil, a cross-head slidably mounted on the plunger, a pair of levers centrally pivoted to the cross-head for folding the ends of the loopblank around its holder between the staple and anvil whereby the movement of the plunger toward the anvil will clench the staple through the part to be attached, cams on the bracketengaging the levers above the cross-head as said cross-head is moved toward the anvil for causing said levers to fold the ends of the loop-blank around the blank-holder and staple, means for sequentially operating the cross-head and plunger, and means for adjusting the lever pivots toward and from each other for varying the opening movement of the lower ends of said levers according to the size of the loop required. Y

6. In a stapling machine for leather loops, the combination of a supporting anvil for one of the parts to be attached, a bracket overhanging the anvil, a plunger movable on the bracket toward` and from the anvil, holders for the loop-blank and staples, respectively, both slidably mounted upon the plunger and movable therewith toward and from the anvil, a cross-head slidably mounted on the plunger, a pair of levers centrally pivoted to the cross-head for folding the ends of the loop-blank around its holder between the staple and anvil whereby the movement of the plunger toward the anvil will clench the staple through the part to be attached, cams on the bracket engaging t-he levers above the cross-head as said crosshead is moved toward the anvil for causing seid levers to fold the ends of the loopln Witness whereof l have hereunto set blank around the blank-holder and staple, my hand his 19 day of August, 191.9. means for sequentially opemng the cross- *1 ,AJ I head and plunger, and means lnclucllng a ERFBEIHQK l WVLBUR screw-spindle joulnulecl on the cross-head l/Vtnesses: for moving the lever-pvos toward anfl T. W. WVHIPPLE,

from each other. l?. L. WILBUB. 

